By-pass valve.



A. W. WOODWARD.

BY-PASS VALVE.

APPLICATION FILED FEB. 23, 1911.

Patented Aug. 1, 1911.

AIl'A W. WOODWARD, OF FORT WAYNE, INDIANA.

BY-PASS VALVE.

Specificationof Letters Patent.

- Patented Aug. 1, 1911.

' Application filed February 23, 1911. Serial No. 610,401.

To all whom it may concern:

Be it known that I, ALVA W. WOODWARD, a citizen of the United States ofAmerica, and resident of Fort Wayne, in the county of Allen and State ofIndiana, have invented certain new and useful Improvements in By-PassValves, of which the following is a specification.

This-invention relates to improvements in by-pass valves for gas, steam,water and other fluids, and the object thereof is to provide acontrolling unit for fluids adapted to cause the flow of the fluid topass directly through the unit from the supply main, or, instead, causethe flow to pass through the unit after first passing through a pipe orother circulating system accordingly as the valve mechanism is set, andto so construct the unit with its valve mechanism that the operation ofopening or closing of the passage for the direct flow will effect theopening or closing of the passage for the flow of the fluid through thecirculating system. This object is accomplished by the constructionillustrated in the accompanying drawv ings in which Figure 1, is a sideelevation of the unit; Fig. 2. is a vertical central section of Fig. 1.in a plane at right angles thereto; Fig. 3. is a detail view showing across section on the line XX of Fig. 4.; Fig. 4. is a detail view,partly in vertical section, showingthe threaded sleeve for the operatingrod; Fig. is a detail view showing a plan of Fig. 6.; and Fig. 6. is adetail view showing a vertical section of the pilot valve and contiguousparts of the apparatus. Figs. 3 to 6 inclusive are drawn upon anenlarged scale.

Similar characters of reference indicate corresponding parts throughoutthe several views, and, referring now to the same: The inventioncomprises a casing A having three parts: a central part 1; upper part 2;and lower part 3. The central part has a supply opening 4 and dischargeopening 5 which are separated by an internal partition (5 having avalve-way 7 therein. The upper part 2 of the casing has an inlet opening8, and a valve-way 9 that affords communication with the dischargeopening 5 of the central part 1. The lower part 3 of the casing has anoutlet opening 10, and a valve-way 11 that affords communication withthe supply opening 4 of the central part 1. The valveways 7, 9, and 11are horizontally disposed and are arranged. in vertical alinement.

12 and 13 are valves, respectively, for the valve-ways 9 and 11, and areadapted respectively to close the valve-way 7 in the partition 6 fromopposite sides.

An operating rod 14 extends centrally through the valve-ways 7, 9, and11, and through a stuffing box 15 in the top of the upper part 2. Thelower end of'the rod is screwthreaded and the upper end has fixedthereon a hand-wheel 16 by which the rod is manipulated. The yoke 17surmounts the casing and has fixed in its upper part a removable,internally threaded, collar 18 that is held in place by a screw 19. Uponthe upper part of the rod 14 is an externally screw-threaded sleeve 20that screws into the collar 18, and is secured loosely upon the shaft bya key 21 that allows longitudinal movement of the rod in the sleeve, andalso causes the sleeve to turn with the rod. The threads on the lowerpart of the rod and those on the sleeve are shown in the drawings asleft hand, it being essential that they correspond in that res ectthough right hand threads may be emp oyed as well. But, the threads onthe rod are of double the lead of those on the sleeve.

The valve-13 has a hollow stem 23 that extends through a guide 24, andthe rod 14 has threaded connection with the valve and is adapted toproject into the hollow stem. as the valve is raised. A vertical rib 25on the partition 6, adjacent the side of the valve 13, is engaged bylugs 26 on the edge of the said valve and prevents the valve fromturning. The valve 12 has a central pilot valve 22 which is flared atits lower end and is adapted to seat upwardly against a correspondingface 27 on the valve 12. The central bore 28 of the valve 12 is somewhatlarger than the upper portion of the pilot valve and therefore affords apassageway thcrethrough for fluid when the lower flared end is notseated. A collar 29 is secured to the upper part of pilot valve abovethe valve 12, and lugs 30 on the top of the valve 12, adjacent its bore28, serve to prevent the collar 29 from closing the passageway throughthe bore when the pilot valve is moved downward. The pilot valve isfixed upon the rod 14 by means of a. pin 31 so that the valve 12 will becarried upward or downward by the pilot valve as the case may be.

In the operation of this invention, the easing is connected with itscentral part in line with a gas or other main, so that when the valvemechanism is set as shown in Fig. 2, the fluid will flow through thesupply opening-4, main valve-way 7, and on through the discharge opening5; the circuit openings 8 and 10 are connected respectively withcorresponding terminals of a gas scrubber, heater, cooler or otherappliance having a pipe or other circlating system. When it is desiredthat the flow through the main and central section 1 shall be divertedthrough the circulating system (not shown), the hand wheel is turned inthe proper direction, and consequently the pilot valve will be carriedwith the rod 14 downward, and will leave its seat on the valve 12 if thelatter tends to remain seated. The lower valve 13 remains upon its seatduring the turning movement of the rod 14 until the .latter passesdownwardly in the sleeve 20 sufliciently for the hub of the hand-wheel16 to impinge against the top of said sleeve. The further downwardmovement of the rod 14 is dependent upon the downward movement of thesleeve. The threads on the lower end of the rod having greater lead thanthose on the sleeve, will cause the valve 13 to move upwardly upon thered, as the latter is turned, at a greater velocity than that of thesleeve 20 in its downward movement in the yoke. Thus the fluid may enterthe circulating system through the bore of the valve 12, which will havethe effect of equalizing the pressure upon both sides of each valve, andthe tendency of the valves to remain seated due to greater pressurewithin the main is overcome. The valves 12 and 13 are drawn toward eachother by turning the rod until the main valve-way 7 is closed uponeither side by the valves 12 and 13, and the valve-ways 9 and 11 areconsequently opened to allow the fluid to pass through the circuit. Itwill thus appear that in opening the circuit valveways 9 and 11, themain valve-way 7 becomes closed, and in opening the latter, the formerbecome closed, and thus accomplishing the object of the invention.

Having described my invention, what I claim and desire to secure byLetters Patent is:

1. In a by-pass valve, a casing having a main valve-way and two by-passvalveways; two valves arranged to close the main valveway, one uponeither side thereof, and each being also adapted to close one of saidby-pass valve-ways; and an operating rod with means in connectiontherewith to adjust said valves.

2. In a by-pass valve, a casing having a main valve-way and two by-passvalveways, and having also supply and discharge openings communicatingrespectively with t e main valve-way, and in ct and outlet openingscommunicating respectively with the corresponding by-pass valve-ways,one of said by-pass valve-ways communicating also with the'supplyopening and the other with the discharge opening; two valves arranged toclose the main valve-way, one upon either side thereof, and each beingalso adapted to close one of said by-pass valveways; and means to adjustsaid valves.

3. In apparatus of the class described, a unit composed of a casinghaving therein a main valve-way and two by-pass valve-ways and a valvemechanism consisting of an operating rod and two valves in connectiontherewith, said valves being arranged to close the two by-passvalve-ways, leaving the main valve-way open, or to close the mainvalve-way and leaving the by-pass valve-ways open, accordingly as thevalve rod is manipulated.

4. In apparatus of the class described, a casing having a central part,upper part and lower part, the said central part having an internalpartition with a valve-way therein, a valve-way between said lower partand the central part, and another valve-way between the central part andsaid upper part, the two latter valve-ways communicating respectivelywith the central part upon opposite sides of said partition; and twovalves in connection with means to operate the same adapted to close thelatter two valveways, leaving the valve-way in said partition open, orclose the valve-way in the partition, leaving the other valve-ways openaccordingly as the operating means for the valves is adjusted.

5. In apparatus of the class described, a casing having therein a mainand two bypass valve-ways horizontally disposed and in verticalalinement; an operating rod ex tending into the casing and through saidvalve-ways; a valve between the main and lowermost valve-ways, havingscrew-thread ed connection with the rod; another valve between the mainand upmost valve-ways having connection with the rod; a collar mountedin fixed relation with the casing; and a sleeve keyed loosely on the rodand affording the latter longitudinal play therein and havingscrew-threaded relation with the collar.

6. In apparatus of the class described, a casing having therein a mainand two bypass valve-ways horizontally disposed and in verticalalinement; an operating rod extending into the casing and through saidvalve-ways; a valve between the main and lowermost valve-ways, havingscrew-threaded connection with the rod; another valve between the mainand upmost valve-ways having a central bore; a pilot valve arrangedloosely in said bore and having fixed connection with the rod; and meansfor turning valves and fixed connection with the other andlongitudinally moving the rod. and being adapted to be turned and moved7. In a by-pass valve, a casing havi g a longitudlnally to ad]ustsa1dvalves. lnain valve-Way and two by-pass valve-Ways, In s mo y w ereo Iafi X my slgnature 5 each horizontally disposed and arranged in In prence f t O W E GSSQS- vertical alinement With the others; tWo ALVA W.VVOODWARD valves, one for each of the by-pass valve- Ways and adaptedalso to close the main Witnesses:

valve-Way; and an operating rod having MATHILDA METTLER, 10screw-threaded connection with one of said WALTER G. BURNS.

